Air-compressor



(No Model.) 4 SheetsSheen 1.

0. MOORE. AIR- COMPRESSOR.

Patented Sept. 18, 1883.

(No Model.) 4 Sheets-Sheet 2.

0. MOORE.

AIR COMPRESSOR.

INVENTOR WITN ESSES: kmymm (No Model.) 4'Sheets-Shee1; 3.

U. MOORE.

AIR COMPRESSOR. No. 285,297. Patented Sept. 18, 1883.

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(No Model.) '4 Sheets-Sheen 4.

O. MOORE.

AIR COMPRESSOR. No. 285,297. Patented Sept. 18, 1883.

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oHAnLns MOORE, OF PHILADELPHIA, FENNSYLVANIA.

AIR-COMPRESSOR.

SPECIFICATION forming part of Letters Patent No. 285,297, dated September 18, 1883.

Application filed April 24. 1888. (No model.) 0

To all whom it may concern:

Be it known that I, CHARLES MOORE, of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Air-Compressors, of which improvements the following is a specification.

The object of my invention is to simplify and perfect the construction and operation of apparatus in which the compression of air is plied, in the respects of reducing the cost of apparatus of such character, facilitating its operation by providing convenient and effective means for effecting the ingress and egress of the water to and from the compressing-chamher, and reducing the tendency to undue wear or derangement of the moving parts.

To these ends my improvements consist in certain novel devices and combinations, hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a vertical longitudinal section, through an aircompressor embodying my invention, at the line a; x of Fig. 2; Fig. 2, a vertical transverse section at the line 3 y of Fig. 1; Fig. 3, ahorizontal section at the line 2 z of Fig. 1; Figs. 4, 5, and 6, vertical longitudinal sections through the base at the lines 1010, o o, and r r, respectively, of Fig. 3; Figs. 7, 8, and 9, vertical transverse sections at the lines 8 8, t1,

and a a, respectively, of Fig. 3; Fig. 10, a plan or top View of the operating mechanism of the water-valves, and Figs. 11 and 12 views on an enlarged scale, illustrating the relation of the spring-latch and the bearing-face of the fixe stud.

In the practice of my invention, I construct, preferably of cast metal of proper strength, a chamber or casing,-A, the lower side of which is closed by abottom or bed piece, A, to which the casing is secured by bolts a. A dome, A is formed upon the top of the chamber, and is closed by a cap, a secured by bolts a; A water-supply passage, 13, to the outer end of which is connected a nozzle, 1), for the attachment of a water-supply pipe, is cored in the bed-plate A, said inlet terminating at its inner end in a chamber b in the uJJer and lower portions of which are located, respectively, the seats of a double-beat puppet waterinlet valve to be presently described, the upper of said seats being formed in'a removable nozzle, I)", screwed into the top of the chamher. A water-exhaust passage, 0, to which is connected a water exhaust pipe, 0, is cored in work within and close against the bottom of a,

removable cage. or socket, cl, secured in the top of the :chamber :A, said valve Opening downwardly by the external pressure of the air, supplemented by its own gravity, and being closed by a double-armed lever, D, pivoted to the inside of the top of the case and having a weight, (1, upon one of its ends and a pin or stud, d at the other, which bears against, without being connected to, the airinlet valve D, and serves toclose and hold the latter firmly to its seat, except during such intervals as itis withdrawn from its bearing against the air-inlet valve by the elevation of the main water-exhaust valve, as hereinafter set forth. The air-discharge valve E seats in a cage, 6, formed in or secured to the cap a of the dome A and when elevated from its seat by preponderance of internal pressure in the chamber establishes communication between the latter and an air-discharge nozzle, c, to which a suitable air-discharge pipe may be connected. A float, E, which seats on aring, e in the bottom of the cap a", abuts against a supplemental valve, 6, and acts to close the same when raised from its seat by the entrance of an excess of water into the chamber.

The admission of water to and its discharge from the chamber A are effected by the open ing at the proper intervals of the water-inlet and discharge-valves, respectively, through the movements of a float, F, which is secured upon one end ofa stem, F, upon the opposite end of which is formed ahub or boss, f, which is fitted to oscillate freely upon apin or stud, f, fixed in a frame or standard, F secured to the bed-plate. A rock-shalt, f, having two oppositely-projecting arms, f ffl is journaled on one side of the standard F. A latch, f having a tooth or projection, f the upper and lower sides of which are beveled or inclined adjacent to its upper end, is journaled at its lower end to a pin on the arm f of the rockshaft, and is adapted to abut, either above or below the tooth f against a squared bearingface formed on the fixed stud f and is pressed up to said face by a spring, f. The tooth f is disengaged from the stud f 2 at each upward and downward movement of the float by one or the other of two adjustable screws,f which engage threads in the hub f of the float-stem F, above and below the stud f respectively.

The water-inlet valve is composed of an upper disk or section, B, which seats in the nozzle b", and a lower section, B", of slightly larger diameter, seating in the bottom of the chamber 12, said lower section being formed on or secured to a stem, 1), which is screwed into the upper section, B, by which construction such adjustability of the valves is afforded, relatively one to the other, as will enable their accurate fit to their seats to be insured at all times by simple regulation, and by the difference in diameter of the sections such excess of pressure is exerted upon the lower as will tend to keep the valve closely to its seat when closed. The upper section, B, is coupled by a pin, D to a stem, If, to allow of a limited degree of lateral motion in seating; and the stem 1), which, if desired, may be made in two sections connected by screw-threads, as shown in Fig. 1, to provide greater facility of adjustment, is journaled at its upper end to a pin, f on the arm f of the rock-shaft f.

The main exhaust-water valve 0, which is b reference com osed of a rin or diskof rubber or other flexible material, is secured by a bolt and washer to the lower end by a vertical stem, 0, working through guides in the standard F", and is lifted from its seat during the intervals in which the exhaust of the water is effected by a spring, 0", bearing against its lower side. It is closed and held in closed position by a pin, f, secured to the arm f of the rock-shaft f, and bearing against a pro jection or the end of a recess on the stem 0. A preliminary or supplemental exhaust-valve, H, (one or more,) of small diameter relatively to that of the main exhaust-valve, is fitted to close against a seat on the bed-plate A at the upper end of a supplemental exhaust-passage, c, which communicates with the main exhaust-passage O, and it is journaled at its top to a pin, f, on the arm f of the rock-shaft f. An air-inlet pipe, 0, open at its upper end, which is located above the top of the chamber A, is led into the water-discharge pipe 0, and acts to prevent the siphoning of the water in the latter during its discharge.

To prevent undue jar, shock, and noise in the seating of the water-inlet Valve, and in the movements of the other working parts, adashpot, G, is formed in the bed-plate, and is fitted with a loose piston, g, secured to a rod, 9, which is journaled on a pin, f, on the outer end of the arm f or a spring-weighted lever .or other equivalent device may be employed for the same purpose.

A lever, I, is pivoted to the fioatarin F, adjacent to its hub, and carries two pins or abutments, i, which receive, respectively, the pressure of the free ends of two springs, J connected to the pin f of the rock-shaft f, said springs being adapted to bear alternately up on the upper and upon the lower side of an extension of the pin f and thereby to force the arm f upwardly or downwardly, as the case may be. The two springs J are formed of a single piece of wire, which is coiled intermediately 011 the pin f", and they are thereby cheapened in construction, and their attachment is effected conveniently and without i11- terference with other working parts.

In operation, the parts being in the positions shown in Figs. 1 and 2, water under pressure is admitted to the supply-passage B, and, passing under the sections B B of .the water-inlet valve into the chamber A, raises the float F and compresses the air in the chamber until, by the movement of the arm and hub of the float, the lower of the pins, f strikes the'tooth f G of the latch f? and disengages the latch from the squared bearing-face of the stud f The lower of the springs J, by its bearing 011 the pin f then forces the arm f of the rock-shaft upwardly and the arm f downwardly, thereby closing the water-inlet valve and opening the supplemental waterexhaust valve. The pressure which holds down the main water-exhaust valve 0 being then relieved by the opening of the supplemental eXhaust-Valve H, the spring c opens the main exhaust-valve, and, by the action of the stem 0 of said valve upon the pivoted lever D, the air-inlet valve 1) is left free to open. The spring f simultaneously forces the latch f 5 up to the bearing-face ofthe stud f, with the tooth f 6 in position above said stud. The object ,ofbeveling or inclining the sides of the toothf is to cause the supply and exhaust valves to be held firmly to their seats when the latch is engaged, and to insures the locking of the latch by relieving the tooth from contact with the top and bottom of the stud, except at its inner edges. The apparatus would be operative if a single exhaust-valve only were employed; but the application of a main and a preliminary valve expedites the discharge of the water and enables the compressor to be worked with correspondingly greater rapidity. Upon the opening of the exhaust-valves the supply of operating-water passes out through the water-discharge passage 0 and pipe 0, and

' upon the consequent reduction of internal pressure the air-discharge valve E closes and the air-inlet valve D opens. The floatF falls coincidently with the discharge of water until the upper of the'pius, f strikes the tooth f 6 and disengages the latch, whereupon the upper of the springs J forces the arm f downwardly IOU and the arm f upwardly, restoring the parts to their original positions, when the operation is similarly repeated.

I claim as my invention and desire to secure by Letters Patent- 1. The combination, substantially as set forth, of a chamber or casing, a water-supply valve, a main water-exhaust valve separate from and independent of the supply-valve, and a supplemental exhaust-valve which is adapted to open independently and in advance of the main exhaust-valve and thereby to relieve internal pressure thereon.

2. The combination, substantially as set forth, of a chamber or casing, a water-supply valve, a water-eXhaust valve, and a dash-pot having a piston which is coupled to and moves ooin'cidently with the supply-valve, so as to prevent jar or shock in the seating of the same.

3. The combination, substantially as set forth, of a chamber or casing, a float secured to a stem journaledin said casing, a rockshaft having two arms which are coupled, respectively, to a water-supply valve and a water-exhaust valve, a locking-latch coupled to one of the arms of the rock-shaft, and adapted to be engaged and disengaged from a fixed abutment by the movements of the float and its stem, and a spring for imparting vibratory movement to the rock-shaft upon the disengagement of the locking-latch.

4. The combination, substantially as set forth, of a fixed stud or pin having a squared bearing-face, a float secured upon a stem j ournaled on said stud, a rock-shaft having two arms which are coupled, respectively, to a water-supply valve and to a water-exhaust valve, a locking-latch coupled to one of the arms of said rock-shaft and pressed against the bearing-face of the stud by a spring, a tooth or projection upon the locking-latch acting to engage the same'wiih the stud, and two pins or projections upon the float-stem, adapted to alternately disengage the latch from the stud by the oscillations of the floatstem on said stud.

5. The combination, substantially as set forth, of a fixed stud having a squared bearing-face, a vibrating rock-shaft having ,two arms secured thereto, a locking-latch pivoted to one of said arms, and a tooth or projection formed upon said latch, and having beveled or inclined sides adapted to rest alternately above and below the stud in the oscillations of the rock-shaft.

6. The combination, substantially as set forth, of a rock-shaft having arms which are coupled, respectively, to a water-supply valve.

and a water-exhaust valve, a locking-latch pivoted to one of said arms, and adapted to be engaged with and disengaged from a fixed abutment, and a pair of springs secured to a pin on one of the arms of the rock-shaft, and adapted to bear alternately upon a pin on the opposite arm. 7

7. The combination, substantially as set forth, of a rock-shaft having arms which are coupled, respectively, to a water-supply and a water-exhaust valve, a locking-latch pivoted toone of said arms, and adapted to be engaged with and disengaged from a fixed abutment, a float secured to a vibrating stem which engages and disengages the latch, a spring connected to one of the arms of the rock-shaft, and adapted to bear against a'pin or stop on the other arm, and a lever pivoted to the floatarm and carrying a pin or abutment for the free end of said spring.

8. The combination, substantially "as set forth, of a chamber or casing, a water-inlet passage communicating therewith, and a wator-inlet valve formed of two separate sections, having their seats in a chamber opening into the water-inlet passage, and being connected so as to be adjustable toward and from one another at pleasure.

9. The combination, substantially as set forth, of a chamber or casing, a water-inlet passage and valve, a water-exhaust passage andvalve, and a pipe communicating at one end with said exhaust-passage and open at the other to the atmosphere, so as to prevent siphoning of the water in the passage.

10. The combination, substantially as set forth, of a chamber or casing, a water-inlet passage and valve, a water-exhaust passage and valve, a preliminary exhaust-valve, an air-inlet valve, an air-discharge valve, arockshaft having two arms, one of which is coupled to the water-inlet valve-and to the rod of a piston working in a dash-pot and the other to the water-exhaust valves and to a locking-latch adapted to be engaged with and disengaged from a fixed abutment, a float secured to a .stem adapted to effect the engagement and disengagement of said locking-latch, and a spring or springs acting to effect the vibration ofthe rockshatt during the intervals of disengagement of the locking-latch from its abut- 

